The existing DNS records (those that are in the DNS servers, that is) also contain lots of good entries.
So, why not preload the portal with whatever is currently in the ampr.org and 44.in-addr.arpa zone files? The worst you'd get is what you have now, so you'd be no worse off.
To gradually remove old records, you could add a "renewal" date field so that everyone has to reaffirm that each record is valid every, say, 3 years (what our local repeater coordinator requires). Renewal could be as simple as logging into your account, navigating to the DNS page, placing a check mark next to each record that is valid, and pressing "confirm" or whatever, which would reset the clock for that record for another 3 years. If you're anxious to purge existing errors, you could even make the first time-out be something shorter, like 6 months.
Michael N6MEF
-----Original Message-----
The changeover may require everyone to re-enter their DNS entries at the portal unless we can come up with a better way of doing it. The problem is that the existing DNS records are filled with obsolete and incorrect entries so we can't simply grandfather all the old records into the new system.